Voltage Drop Testing
Pinpoint hidden electrical resistance that causes problems. Our advanced voltage drop testing identifies faulty grounds and corroded wiring without guesswork. By appointment only to provide your complex electrical system our undivided expert attention. Call now to book.
Voltage drop is one of the most overlooked and misdiagnosed electrical problems in modern vehicles, especially here in Gilbert, AZ, where extreme heat can accelerate wear on electrical components and batteries. Voltage drop occurs when there is unwanted resistance somewhere in an electrical circuit, reducing the amount of voltage that reaches the intended component. This seemingly small loss can cause a wide range of issues, from dim or flickering headlights and slow or unresponsive power windows to no-start conditions and even damage to sensitive control modules.
At Apex Automotive, your personal mechanic, David Jr., brings expert-level skills in auto electrical diagnostics and repair, specializing in voltage drop testing to accurately pinpoint where high resistance exists within any circuit. Our diagnostic-first, anti-parts-cannon approach means we don’t guess or replace parts blindly. Instead, we use detailed wiring diagrams and advanced tools—including high-impedance multimeters and oscilloscopes—to perform precise circuit-level troubleshooting.
Our voltage drop testing process involves measuring the voltage loss across specific sections of a circuit while it is under real-world load conditions. Even a voltage drop of just a few tenths of a volt can indicate an underlying problem. We test both the positive and negative sides of the circuit, giving particular attention to ground connections, which are a frequent source of high resistance and electrical faults. Many common issues, like corroded or damaged wiring, loose terminals, or failing connectors, can still pass a basic continuity test but fail under load, leading to intermittent or chronic problems.
By identifying and correcting the exact source of voltage drop, we restore proper circuit function, extend the life of your vehicle’s electrical system, and prevent unnecessary replacement of costly components like batteries, alternators, or control modules. In Arizona’s harsh climate, where batteries often fail within 2-3 years due to heat stress, ensuring your electrical circuits are operating efficiently is more important than ever.
At Apex Automotive, we’re committed to providing thorough, transparent diagnostics by appointment only, so you get the expert attention your vehicle deserves. Call David Jr. at (480) 588-2250 to schedule your voltage drop testing and keep your vehicle’s electrical system running strong.